As a meta-issue, it&#39;s been hard to make meaningful commentary during this review process because the latest proposal has been so rapidly shifting throughout. What, exactly, is the version we are reviewing at the moment? Can we have a few days to mull over that version specifically?<br><div class="gmail_quote"><div dir="ltr">On Thu, Jun 30, 2016 at 12:24 David Sweeris via swift-evolution &lt;<a href="mailto:swift-evolution@swift.org">swift-evolution@swift.org</a>&gt; wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word">Agreed. Also, if we’re supposed to say `MemoryLayout.of()` now, does MemoryLayout still need a public init? Half of the proposal’s problems revolve around the likely-unexpected behavior caused by passing T.self to the init function (although, argument labels would also solve the issue).<div><br></div><div>- Dave Sweeris</div></div><div style="word-wrap:break-word"><div><br><div>On Jun 29, 2016, at 10:05 PM, Jacob Bandes-Storch via swift-evolution &lt;<a href="mailto:swift-evolution@swift.org" target="_blank">swift-evolution@swift.org</a>&gt; wrote:<div><blockquote type="cite"><br><div><div dir="ltr">I&#39;m not sure this bikeshed is the right color yet.<br><div><br></div><div>How does the user remember the distinction between MemoryLayout&lt;Int&gt; and MemoryLayout.of(Int) ? To keep it clear, how about ofValue() rather than of() ?</div><div><br></div><div>Also, could the implementation be simply</div><div><br></div><div>    static func ofValue(_ value: @autoclosure () -&gt; T) -&gt; MemoryLayout&lt;T&gt;.Type {</div><div>        return self</div><div>    }</div><div><br></div><div>?</div><div class="gmail_extra"><br clear="all"><div><div data-smartmail="gmail_signature"><div dir="ltr"><div>Jacob<br></div></div></div></div>
<br><div class="gmail_quote">On Wed, Jun 29, 2016 at 7:36 PM, Erica Sadun via swift-evolution <span dir="ltr">&lt;<a href="mailto:swift-evolution@swift.org" target="_blank">swift-evolution@swift.org</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word"><span><br><div><blockquote type="cite"><div>On Jun 29, 2016, at 3:59 PM, Xiaodi Wu via swift-evolution &lt;<a href="mailto:swift-evolution@swift.org" target="_blank">swift-evolution@swift.org</a>&gt; wrote:</div><br><div><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Wed, Jun 29, 2016 at 4:50 PM, David Sweeris <span dir="ltr">&lt;<a href="mailto:davesweeris@mac.com" target="_blank">davesweeris@mac.com</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word">That’s the “as proposed” usage for getting the size of a value (from <a href="https://gist.github.com/erica/57a64163870486468180b8bab8a6294e" target="_blank">https://gist.github.com/erica/57a64163870486468180b8bab8a6294e</a>) <div><pre style="font-family:Consolas,&#39;Liberation Mono&#39;,Menlo,Courier,monospace;font-size:14px;margin-top:0px;margin-bottom:0px;line-height:1.45;word-wrap:normal;padding:16px;overflow:auto;background-color:rgb(247,247,247);border-top-left-radius:3px;border-top-right-radius:3px;border-bottom-right-radius:3px;border-bottom-left-radius:3px;word-break:normal;color:rgb(51,51,51)"><span style="color:rgb(150,152,150)">// Types</span>
MemoryLayout<span style="color:rgb(167,29,93)">&lt;</span><span style="color:rgb(0,134,179)">Int</span><span style="color:rgb(167,29,93)">&gt;.</span>size <span style="color:rgb(150,152,150)">// 8 </span>
MemoryLayout<span style="color:rgb(167,29,93)">&lt;</span><span style="color:rgb(0,134,179)">Int</span><span style="color:rgb(167,29,93)">&gt;.</span>arraySpacing <span style="color:rgb(150,152,150)">// 8</span>
MemoryLayout<span style="color:rgb(167,29,93)">&lt;</span><span style="color:rgb(0,134,179)">Int</span><span style="color:rgb(167,29,93)">&gt;.</span>alignment <span style="color:rgb(150,152,150)">// 8</span>

<span style="color:rgb(150,152,150)">// Value</span>
<span style="color:rgb(167,29,93)">let</span> x: <span style="color:rgb(0,134,179)">UInt8</span> <span style="color:rgb(167,29,93)">=</span> <span style="color:rgb(0,134,179)">5</span>
MemoryLayout(x)<span style="color:rgb(167,29,93)">.</span><span style="color:rgb(167,29,93)">dynamicType</span><span style="color:rgb(167,29,93)">.</span>size <span style="color:rgb(150,152,150)">// 1</span>
MemoryLayout(<span style="color:rgb(24,54,145)"><span>&quot;</span>hello<span>&quot;</span></span>)<span style="color:rgb(167,29,93)">.</span><span style="color:rgb(167,29,93)">dynamicType</span><span style="color:rgb(167,29,93)">.</span>arraySpacing <span style="color:rgb(150,152,150)">// 24</span>
MemoryLayout(<span style="color:rgb(0,134,179)">29</span><span style="color:rgb(167,29,93)">.</span><span style="color:rgb(0,134,179)">2</span>)<span style="color:rgb(167,29,93)">.</span><span style="color:rgb(167,29,93)">dynamicType</span><span style="color:rgb(167,29,93)">.</span>alignment <span style="color:rgb(150,152,150)">// 8</span></pre><div><br></div><div><br></div>At least, I <i>thought</i> that was the latest version of the proposal. Maybe I’ve gotten confused.</div></div></blockquote><div><br></div><div>There must be a typo in these examples. `MemoryLayout(x.dynamicType).size` perhaps?</div></div></div></div></div></blockquote><br></div></span><div>I have listened. I have updated.</div><div><br></div><div><a href="https://gist.github.com/erica/57a64163870486468180b8bab8a6294e" target="_blank">https://gist.github.com/erica/57a64163870486468180b8bab8a6294e</a></div><div><br></div><div><span><div style="margin:0px;font-size:16px;line-height:normal;font-family:Menlo;color:rgb(0,132,0)"><span>// Types</span></div><div style="margin:0px;font-size:16px;line-height:normal;font-family:Menlo;color:rgb(79,129,135)"><span>MemoryLayout</span><span>&lt;</span><span style="color:#703daa">Int</span><span>&gt;.</span><span>size</span><span> </span><span style="color:#008400">// 8</span></div><div style="margin:0px;font-size:16px;line-height:normal;font-family:Menlo;color:rgb(79,129,135)"><span>MemoryLayout</span><span>&lt;</span><span style="color:#703daa">Int</span><span>&gt;.</span><span>arraySpacing</span><span> </span><span style="color:#008400">// 8</span></div><div style="margin:0px;font-size:16px;line-height:normal;font-family:Menlo;color:rgb(79,129,135)"><span>MemoryLayout</span><span>&lt;</span><span style="color:#703daa">Int</span><span>&gt;.</span><span>alignment</span><span> </span><span style="color:#008400">// 8</span></div><div style="margin:0px;font-size:16px;line-height:normal;font-family:Menlo;min-height:19px"><span></span><br></div><div style="margin:0px;font-size:16px;line-height:normal;font-family:Menlo;color:rgb(0,132,0)"><span>// Value</span></div><div style="margin:0px;font-size:16px;line-height:normal;font-family:Menlo"><span style="color:#bb2ca2">let</span><span> x: </span><span style="color:#703daa">UInt8</span><span> = </span><span style="color:#272ad8">5</span></div></span><div style="margin:0px;font-size:16px;line-height:normal;font-family:Menlo;color:rgb(79,129,135)"><span>MemoryLayout</span><span>.</span><span style="color:#31595d">of</span><span>(</span><span>x</span><span>).</span><span>size</span><span> </span><span style="color:#008400">// 1</span></div><div style="margin:0px;font-size:16px;line-height:normal;font-family:Menlo;color:rgb(79,129,135)"><span>MemoryLayout</span><span>.</span><span style="color:#31595d">of</span><span>(</span><span style="color:#272ad8">1</span><span>).</span><span>size</span><span> </span><span style="color:#008400">// 8</span></div><div style="margin:0px;font-size:16px;line-height:normal;font-family:Menlo;color:rgb(79,129,135)"><span>MemoryLayout</span><span>.</span><span style="color:#31595d">of</span><span>(</span><span style="color:#d12f1b">&quot;hello&quot;</span><span>).</span><span>arraySpacing</span><span> </span><span style="color:#008400">// 24</span></div><div style="margin:0px;font-size:16px;line-height:normal;font-family:Menlo;color:rgb(79,129,135)"><span>MemoryLayout</span><span>.</span><span style="color:#31595d">of</span><span>(</span><span style="color:#272ad8">29.2</span><span>).</span><span>alignment</span><span> </span><span style="color:#008400">// 8</span></div><span><font color="#888888"><div><span style="color:#008400"><br></span></div><div><span style="color:#008400"><br></span></div><div><span style="color:#008400">-- E</span></div></font></span></div><br></div><br>_______________________________________________<br>
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